Drawing-board attachment.



LL Z m V A. H. MARANDA. DRAWING BOARD ATTACHMENT. APPLICATION FILED JAN.12, 1910.

962,776. Patented June28, 1910.

UNITED STATES PATENT OFFICE.

ALBERT HARRY IVIAR-ANDA, OF PITTSBURG, PENNSYLVANIA.

DRAWING-BOARD ATTACHMENT.

To all whom it may concern:

Be it known that I, ALBERT HARRY MA- RANDA, a citizen of the UnitedStates of America, residing at Pittsburg, in the county of Allegheny andState of Pennsylvania, have invented certain new and useful Improvementsin Drawing-Board Attachments, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to drawing boards, and the object thereof is toprovide a board of such class with means in a manner as hereinafter setforth and claimed to enable the convenient setting of a T-square at anangle and at the same time providing a straight edge against which theT-square can slide when it is necessary.

Further objects of the invention are to provide a drawing board withwhat may be termed an angle-forming attachment for T- squares and whichshall be simple in its construction and arrangement, strong, durable,eflicient in its use, readily adjustable, conveniently fixed in itsadjusted position, and inexpensive to manufacture.

With the foregoing and other objects in view the invention consists inthe novel construction, combination and arrangement of parts ashereinafter more specifically described and illustrated in theaccompanying drawings wherein is shown the preferred embodiment of theinvention, but it is to be un derstood that changes, variations, andmodifications can be resorted to which fall within the scope of theclaims hereunto appended.

In the drawings wherein like reference characters denote correspondingparts throughout the several views, Figure 1 is a front view broken awayat the center and one side of a drawing board in accordance with thisinvention, Fig. 2 is a section on line 22 of Fig. 1 looking in thedirection of the arrow, Fig. 3 is a section on line 33 of Fig. 1 lookingin the direction of the arrow, Fig. 4 is an end view, and Fig. 5 is aperspective view illustrating the adjusting screw.

Referring to the drawings in detail, 1 denotes the body portion of theboard having attached to its lower face the supporting cleats 2. Thebody portion 1, as well as the cleats 2, can be of any suitableconstruction, as well as any suitable material. The cleats Specificationof Letters Patent.

Application filed January 12, 1910.

2 maintain the board elevated from the support upon which the board ismounted.

Patented June 28, 1910. Serial No. 527,532.

Extending in parallelism with respect to one side of the body 1 and of alength as to project beyond the top of the board isa rule 3 capable ofbeing adjusted to various angles with respect to the edge 4 of the bodyportion 1 and when adjusted adapted to set the blade of a T-square, thelatter being shown in dotted lines in Fig. 1 and indicated at 5, at theangle desired, the T-square riding against the straight edge 6 of theadjustable rule 3. The rule 3 is spaced from the edge 4 of the bodyportion 1 as at 7, whereby the upper portion of the rule 3 can be movedagainst the edge 4 so that the upper portion of the rule 3 will inclinetoward the body portion 1. The rule 3 is pivotally-connected at itslower end to a supporting bracket 8, the latter being secured by thehold-fast devices 9 to the lower end 10 of the body portion 1 and beingformed with an upwardlycurved arm 11 which projects from the end 10 andhas its terminus rounded as at 12. The arm 11 has mounted thereon therule 3; the later being L-shaped in cross section, and extending throughthe rule 3 and engaging in the arm 11 is a screw 13 forpivotally-connecting the lower end of the rule 3 to the said arm. Theupper end of the rule 3 is formed with a longitudinally-extending slot14 which in connection with a pin 15 having a screw-threaded end 15forms What may be termed a pin and slot connection between the upper endof the rule 3 and an adjusting screw referred to generally by thereference character 16, Fig. 5.

Connected to the upper end 17 of the body portion 1 is a bracket 18provided with arms 19, 20, 21, and 22. Extending through the said armsis the shank 23 of the adjusting screw 16, said shank being formed oftwo different diameters, that portion of reduced diameter beingindicated by the reference character 24 and provided at its terminuswith a stop pin 25 limiting the movement in one direction of the screw16. That portion of the shank 23 of larger diameter is threaded as at 26and has mounted thereon an adjusting nut 27. That portion of largerdiameter of the shank terminates in a head 28 which is formed with anopening 29 through which extends the pin 15. That portion of the shankof larger diameter extends through the arms 19, 20 and 21 of the bracket18, while the portion 24 of reduced diameter extends through the arm 22of the said bracket. The ad usting nut 27 is arranged upon thescrew-threaded portion 26 of the adjusting screw so that the nut will bepositioned between the arms 20 and 21 of the bracket 18.

Interposed between the upper face of the head 28 and the rule 3 andsurrounding the pin 15 is a washer 30, and mounted against the lowerface of the head 28 and surrounding the pin 15 is a washer 31. Thescrewthreaded end 15 of the pin 15 is provided with a thumb nut 32 whichwhen screwed home is adapted to fivedly-connect the upper end of therule 3 to the adjusting screw 16 whereby the rule 3 will be maintainedin the position to which it has been adjusted.

lVhen it is desired to adjust the rule 3, the thumb nut 32 is loosenedand the screw 16 adjusted so as to move the rule 3- to the desiredangle, thumb nut 32 is then screwed home whereby the rule 3 will befixedly-secured in the position to which it has been adjusted. hen therule 3 is adjusted by longitudinally-moving the adjusting screw 16, thelower portion of the rule 3 swings upon its pivot.

What I claim is:

1. A drawing board comprising the com bination with the body portionthereof, of anadjustable rule for settinga T-square at an angle andhaving a longitudinal slot at one end, means projecting from thebodyportion for pivotally-connecting the other end of the rule thereto,an adjusting screw carried by the other end of said body portion, andmeans extending through said slot and engaging said screw for connectingthe slotted end of the rule with that end of the body portion carryingthe adjusting screw whereby when the latter is shifted the rule will beadjusted and the T-square set at an angle.

2. A drawing board comprising the combination with the body portionthereof, of a bracket secured to one end and provided with a series ofcombined supporting and retaining arms, a bracket secured to the otherend of said body portion and provided with an arm projecting from oneside of the body portion, an adjustable rule for setting a T-square atan angle, said rule arranged at one side of said body portion, means forpivotally-connecting one end of said rule to said outwardly-pro ectingarm, an adjusting screw mounted in said supporting arms, a nut mountedon said screw, and a pin and slot connection between the other end ofsaid rule and one end of said adjusting screw.

3. A drawing board comprising the com bination with the body portionthereof, of a bracket secured to one end and provided with a series ofcombined supporting and retaining arms, a bracket secured to the otherend of said body portion and provided with an arm projecting from oneside of the body portion, an adjustable rule for setting a T-square atan angle, said rule arranged at one side of said body portion, andsubstantially Lshaped in cross section, means for pivotally-connectingone end of said rule to said outwardly-projecting arm, an adjustingscrew mounted in said supporting arms, a nut mounted on said screw, anda pin and slot connection between the other end of said rule and one endof said adjusting screw.

4. A drawing board comprising the combination with the body portionthereof, of a bracket secured to one end and provided with a series ofcombined supporting and retaining arms, a bracket secured to the otherend of said body portion and provided with an arm projecting from oneside of the body portion, an adjustable rule for setting a T-square atan angle, said rule arranged at one side of said body portion, andsubstantially angle-shaped in cross section, means forpivotally-connecting one end of said rule to said outwardly-projectingarm, an adjusting screw mounted in said supporting arms and having astop at one end adapted to engage one of said arms, a nut mounted onsaid screw, and a pin and slot connection between the other end of saidrule and one end of said adjusting screw.

In testimony whereof I atfix my signature in the presence of twowitnesses.

ALBERT HARRY MARANDA.

lVitnesses A. H. RABsAo, KARL H. BUTLER.

